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Germanium telluride-based thermoelectric material and preparation method and application thereof
The invention discloses a germanium telluride-based thermoelectric material and application. The chemical formula of the germanium telluride-based thermoelectric material is Ge1-nMnTe, wherein M is selected from at least one of Bi, In and Cd; the molar fraction of M is n, and n is greater than 0 and less than or equal to 0.11. According to the application, a strategy of co-doping three elements is adopted, and co-doping of the three different elements not only optimizes the carrier concentration and the energy band structure of germanium telluride, but also effectively reduces the lattice thermal conductivity of germanium telluride under the condition of keeping high carrier mobility. Therefore, the thermoelectric merit figure of germanium telluride is improved under the comprehensive regulation and control effect of electrical and thermal performance. The germanium telluride-based thermoelectric material is simple, stable and efficient in preparation process and excellent in thermoelectric performance, and can well meet the requirements of thermoelectric power generation application in a medium-temperature region.
本申请公开了一种碲化锗基热电材料和应用，化学式为Ge1‑nMnTe；其中，M选自Bi、In、Cd中的至少一种；M的摩尔分数为n，0＜n≤0.11。本申请采用三种元素共同掺杂的策略，三种不同元素的共同掺杂不仅优化了碲化锗的载流子浓度和能带结构，并且在保持高载流子迁移率的情况下有效降低碲化锗的晶格热导率。因此，在电、热性能综合调控效果下使得碲化锗的热电优值得到了提高。本申请的碲化锗基热电材料，制备工艺简单、稳定、高效，热电性能优异，可以很好地满足中温区热电发电应用的需求。
Germanium telluride-based thermoelectric material and preparation method and application thereof
The invention discloses a germanium telluride-based thermoelectric material and application. The chemical formula of the germanium telluride-based thermoelectric material is Ge1-nMnTe, wherein M is selected from at least one of Bi, In and Cd; the molar fraction of M is n, and n is greater than 0 and less than or equal to 0.11. According to the application, a strategy of co-doping three elements is adopted, and co-doping of the three different elements not only optimizes the carrier concentration and the energy band structure of germanium telluride, but also effectively reduces the lattice thermal conductivity of germanium telluride under the condition of keeping high carrier mobility. Therefore, the thermoelectric merit figure of germanium telluride is improved under the comprehensive regulation and control effect of electrical and thermal performance. The germanium telluride-based thermoelectric material is simple, stable and efficient in preparation process and excellent in thermoelectric performance, and can well meet the requirements of thermoelectric power generation application in a medium-temperature region.
本申请公开了一种碲化锗基热电材料和应用，化学式为Ge1‑nMnTe；其中，M选自Bi、In、Cd中的至少一种；M的摩尔分数为n，0＜n≤0.11。本申请采用三种元素共同掺杂的策略，三种不同元素的共同掺杂不仅优化了碲化锗的载流子浓度和能带结构，并且在保持高载流子迁移率的情况下有效降低碲化锗的晶格热导率。因此，在电、热性能综合调控效果下使得碲化锗的热电优值得到了提高。本申请的碲化锗基热电材料，制备工艺简单、稳定、高效，热电性能优异，可以很好地满足中温区热电发电应用的需求。
Germanium telluride-based thermoelectric material and preparation method and application thereof
一种碲化锗基热电材料及其制备方法和应用
GUO ZHE (author) / WU GUANGJIE (author) / TAN XIAOJIAN (author) / JIANG JUN (author)
2024-04-26
Patent
Electronic Resource
Chinese
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